5 x 65 13 x 25
-17
1, 5, 13
65 x 300 / 2 = 9750
1 x 130, 2 x 65, 5 x 26, 10 x 13
1 x 65, 5 x 13, 13 x 5, 65 x 1
any 2 numbers can be multiplied together. eg. 2x1 is 2. 5x91000 is 455000
1 x 195, 3 x 65, 5 x 39, 13 x 15
These pairs of numbers, when multiplied, equal 195: (1, 195) (3, 65) (5, 39) (13, 15)
-57
It can't be done with whole numbers....but if you want decimals....these two will work 3.7731879764631448414184572689148 17.226812023536855158581542731085
1 x 130, 2 x 65, 5 x 26, 10 x 13, 13 x 10, 26 x 5, 65 x 2, 130 x 1