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To multiply whole number by 100 simply add two zeros to the right end. Example: 341 times 100 is 34100.
Apart from using a calculator, specifically if you multiply a whole number by a power of 10:* To multiply a whole number by 10, add a zero to the whole number. * To multiply a whole number by 100, add two zeros to the whole number. * Etc.
To multiply 30,000,000,000 by 100 you simply add an extra two zeros to the end of the number, making it 3000,000,000,000
5800. Whenever you multiply a number by a factor of 10^x, add the number of zeros to the end of the original number.
Adding the zeros