9 times
15 goes into 1050 seventy times
84 times.
4 times with a remainder of 10
Twice
5
1 goes into 4 four times.
11 times with 3 left over
70 goes into 500. seven times
70 times.
9 with remainder 40.
No, that is a very bad substitute. If you want to go with a 70 series tire go with a 195/70-15 which is a great substitute.