Step 1: The exponent for 10 is 43. Since the exponent is positive, we must move the decimal point of a number 1.8 43 places to the right.

1.8 → 1.8------------------------------------------.

Step 2: Now we just need to replace empty spaces (dashes) with zeros and to delete old decimal point (the black one) to get:

18000000000000000000000000000000000000000000