Addition Without Carrying

My solution:

int additionWithoutCarrying(int param1, int param2) 
{
    return (param1 / 10000 + param2 / 10000) % 10 * 10000 + (param1 / 1000 + param2 / 1000) % 10 * 1000 + (param1 / 100 + param2 / 100) % 10 * 100 + (param1 / 10 + param2 / 10) % 10 * 10 + (param1 + param2) % 10;
}

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