No problem, we've got 4857 and 7804 to multiply
4857 × 7804 = 7804 × (4857)
+ 7804 × 7 what gives us 54628
+ 7804 × 50 yielding 390200
+ 7804 × 800 that equals 6243200
+ 7804 × 4000 giving us 31216000

= 37904028
