Yoongi wants to subtract 57 from a four-digit number. Yoongi misspelled 9 as a 6 in the unit digit of a four-digit number. When the difference obtained by Yoongi is 1819, find a four-digit number.
1819 57 [OP_ADD] 6 9 [OP_SUB] [OP_SUB]
var_a = 1819
var_b = 57
var_c = var_a + var_b
var_d = 6
var_e = 9
var_f = var_d - var_e
var_g = var_c - var_f
print(int(var_g))