No problem, we've got 3135 and 6324 to multiply
3135 × 6324 = 6324 × (3135)
+ 6324 × 5 what gives us 31620
+ 6324 × 30 that is equal 189720
+ 6324 × 100 yielding 632400
+ 6324 × 3000 resulting in 18972000

= 19825740
