I think this is what you do:
20 times 23
20 (20s)= 400
0 (3s)= 3
2 (10s)= 20
10 (2s)= 20
1,100
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Assuming that didgets(?) is meant to be digits, a 27 digit number would be hundreds of septillions.
infinitive
Assuming you mean digits and not didgets, the answer is 6.
yes it is the only way to make it is 1 times 7875 add up the didgets and it is 37 and 37 is a prime number
Yes - double, then double and then double again is the same as multiplying by 8.