X -------- 4 -------- 6 3-digit times 2-digit is a primary school intelligence problem

X -------- 4 -------- 6 3-digit times 2-digit is a primary school intelligence problem


4 must fill in 1, the other answer is 5 digits
The second question mark should be 4 or 9 to get a bit of 6
When the first question mark is 0, only 504 * 14 = 7056
When the second question mark is 9, 4 * x + 3 + x = 5x + 3 can not be a multiple of 10, that is, 0
There is only one set of answers. 504 * 14 = 7056