No problem, we've got 7815 and 5903 to multiply
7815 × 5903 = 5903 × (7815)
+ 5903 × 5 giving us 29515
+ 5903 × 10 resulting in 59030
+ 5903 × 800 that is equal 4722400
+ 5903 × 7000 what gives us 41321000

= 46131945
