Alright, let's work through 13137296 times 52305548 step by step
13137296 × 52305548 = 52305548 × (13137296)
+ 52305548 × 6 that equals 313833288
+ 52305548 × 90 yielding 4707499320
+ 52305548 × 200 that results in 10461109600
+ 52305548 × 7000 that results in 366138836000
+ 52305548 × 30000 that results in 1569166440000
+ 52305548 × 100000 giving us 5230554800000
+ 52305548 × 3000000 yielding 156916644000000
+ 52305548 × 10000000 giving us 523055480000000

= 687153466518208
