678
210 ÷ 14 = 15
210 ÷ 25 = 8 with remainder 10.
14 times... without using a calculator !how many times does 15 go into 210
6 times
15s-15 = 0
10 goes into 210 21 times
The idea is to divide 210 / 3.
210 ÷ 50 = 41/5 = 4.2
0.26666
42 times :)
70 times.