No problem, we've got 1515 and 5202 to multiply
1515 × 5202 = 5202 × (1515)
+ 5202 × 5 that is equal 26010
+ 5202 × 10 that equals 52020
+ 5202 × 500 that equals 2601000
+ 5202 × 1000 that is equal 5202000

= 7881030
