How about: 13 times 13 = 169
1 x 507, 3 x 169, 13 x 39.
The two numbers can be any two numbers so that when they are added, they equal 338.
1 x 169 13 x 13
The two numbers you can multiply together to equal 782 are 23 by 34.
The two numbers you multiply together to equal 391 are 17 by 23.
13 x 13
169
169
The 2 numbers that multiply together to equal 678 are 6 and 113.
-30
20