64.3 times 10 to the power of -8 in scientific notation is written as: 0.000000643
643^8 = 29,220,509,446,475,595,511,201
643 x 176 = 113168
643 ÷ 35 = ~18.37 or 18 times with a remainder of 13.
3215 ÷ 5 = 643
8 times with a remainder of 3
200,000,000
80 times (with a remainder).
9 with remainder 4.
9 R 40
643 is a prime number. So its factors are 1 and 643.
75 of 643 is 48,225. 75% of 643 is 482.25
1 and 643