Add a zero to the right-hand end and halve the answer.
eg 76 x 5 = 760/2 = 380
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Same as you would square any other number - multiply it by itself.
Divide the number by 100 and then multiply the answer by 5. add the number with the answer.
You can multiply 62 by any number. For example 62 multiplied by 3 is 186 or 62 multiplied by 5 is 310
Any number can multiply 115.
Take any 5 prime numbers and multiply them together.