In 123456789, multiply one of the four numbers by the other four digits. The number cannot be repeated
There are two types
1738 * 4 = 6952
1963 * 4 = 7852
1-9 nine numbers, two of which are multiplied by three are equal to the other four and cannot be repeated
27*198=5346
28*157=4396
39*186=7254
42*138=5796
48*159=7632
Divide four numbers by one to get the other four numbers. Fill in the formula with 1-9. It can't be repeated. How many formulas can there be?
Is a four digit divided by a number to get another four digits, a total of nine digits, can not be repeated
6952 ÷ 4 = 1738
7852 ÷ 4 = 1963