To convert numbers written in words into digits, you follow specific rules and conventions based on the structure of the number words. Here’s a step-by-step explanation:

1. Understand the naming conventions:
Familiarize yourself with the words used to represent each digit:
– Zero, one, two, three, four, five, six, seven, eight, nine.
– Ten, eleven, twelve, thirteen, fourteen, fifteen, sixteen, seventeen, eighteen, nineteen.
– Twenty, thirty, forty, fifty, sixty, seventy, eighty, ninety.
– Hundred, thousand, million, billion, trillion, etc.

2. Identify the position of the number words:
Determine the position of each number word in relation to the base units (e.g., ones, tens, hundreds, thousands, etc.). The position helps define the value of each word.

3. Interpret the words:
Assign numerical values to the number words based on their positions:
– For single-digit numbers (0-9), convert the word directly into its digit counterpart.
– For numbers between 10 and 19, identify the unique word associated with that number.
– For numbers between 20 and 99, separate the tens and ones digits and convert each part individually.
– For larger numbers, break them into groups based on the base units (thousands, millions, billions, etc.), and convert each group separately.

4. Combine the values:
Combine the digit values from the previous step to form the complete numerical representation.

Here’s an example to illustrate the process:
“Seventy-two thousand three hundred forty-five”

1. Understand the naming conventions:
– Seventy (70)
– Two (2)
– Thousand (1,000)
– Three (3)
– Hundred (100)
– Forty (40)
– Five (5)

2. Identify the position of the number words:
– Seventy (tens)
– Two (ones)
– Thousand (thousands)
– Three (hundreds)
– Hundred (hundreds)
– Forty (tens)
– Five (ones)

3. Interpret the words:
– Seventy (70)
– Two (2)
– Thousand (1,000)
– Three (3)
– Hundred (100)
– Forty (40)
– Five (5)

4. Combine the values:
70,000 + 300 + 40 + 5 = 70,345

Therefore, “Seventy-two thousand three hundred forty-five” is equivalent to the numerical representation 70,345.