View Compilation Error

0_0_19355226_3908.cpp: In function 'int main()':
0_0_19355226_3908.cpp:16:105: error: lvalue required as left operand of assignment
    if(n == b || n * 10 == b || n * 100 == b || n * 1000 == b || b * 10 == n || b * 100 == n || b * 1000 = n)
                                                                                                         ^