Fill in 123456789?

Fill in 123456789?

*Telephone

123456789 fill in the following formula to make it true
The 9 numbers 123456789 are filled in the following formula. X represents the filling position
XXXX*X=XXXX
To put it simply, you need to multiply a 4-digit number by a 1-digit number to get another 4-digit number. Each digit is required to be used only once

1738*4=6952
1963*4=7852
How about a little bonus~

Answer the following equation: 3 + (- 6) + 6 + (- 9) + 9 +... + 27 + (- 30)

3+（-6）+6+（-9）+9+...+27+（-30）
=3+[（-6）+6]+[（-9）+9]+...[(-27)+27]+（-30）
=3+(-30)
=-27