86*2
2, 364.5
13 and 14
43
Two numbers that multiply to give -1 are -1 and 1.
Force x distance = energy. (Transfer of energy is usually called "work", but the two concepts are related.)
45
57
69
The numbers are: 20 and -48
30
Two consecutive two digit numbers that when multiplied give the product of 812 are 28 and 29.
Those two numbers are 2,337 and 2,338.