Assembly 64 bits function a*b+c/d-(e-f)%(g+h)

Question

I need to solve this function in assembly but I have a problem with modulo. I have no idea why but it gives very strange results.

C++ code

#include <iostream>
extern "C" __int64 suma(int a, int b, int c, int d, int e, int f, int g, int h);
int main()
{
    int a = 1, b = 1, c = 1, d = 1, e = 1, f = 1, g = 1, h = 1;
    int wynik = suma(a, b, c, d, e, f, g, h);
    std::cout << wynik;
    
}

assembly code

.CODE
_DATA SEGMENT
_DATA ENDS
_TEXT SEGMENT
PUBLIC suma
suma PROC
    push rbp;
    mov rbp, rsp;
    imul rcx, rdx; // a * b
    mov rax, r8; // c
    xor rdx, rdx;
    div r9; // c/d
    mov r10, [rbp + 6 * 8]; //e
    sub r10, [rbp + 7 * 8]; // e-f
    mov r11, [rbp + 8 * 8]; // g
    add r11, [rbp + 9 * 8]; //g + h
    add rcx, rax; // a * b + c / d
    sub rcx, r10; // a * b + c / d - e - f
    mov rdx, 0;
    mov rax, rcx; 
    idiv r11;
    mov rax, rdx;
    pop rbp;
ret
suma ENDP
_TEXT ENDS
END