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function bcmul(left_operand, right_operand, scale) {
    // Returns the multiplication of two arbitrary precision numbers  
    // 
    // version: 909.322
    // discuss at: http://phpjs.org/functions/bcmul    // +   original by: lmeyrick (https://sourceforge.net/projects/bcmath-js/)
    // -    depends on: _phpjs_shared_bc
    // *     example 1: bcmul(1, 2);
    // *     returns 1: 3
//  @todo: implement these testcases//        bcscale(0);
//
//        bcmath.test.result('bcmul', 1, '2', bcmul("1", "2"));
//        bcmath.test.result('bcmul', 2, '-15', bcmul("-3", "5"));
//        bcmath.test.result('bcmul', 3, '12193263111263526900', bcmul("1234567890", "9876543210"));//        bcmath.test.result('bcmul', 4, '3.75', bcmul("2.5", "1.5", 2));
//        bcmath.test.result('bcmul', 5, '13008.1522', bcmul("5573.33", "2.334", 4));
 
    var libbcmath = this._phpjs_shared_bc();
     var first, second, result;
 
    if (typeof(scale) == 'undefined') {
        scale = libbcmath.scale;
    }    scale   = ((scale < 0) ? 0 : scale);
 
    // create objects
    first   = libbcmath.bc_init_num();
    second  = libbcmath.bc_init_num();    result  = libbcmath.bc_init_num();
 
    first   = libbcmath.php_str2num(left_operand.toString());
    second  = libbcmath.php_str2num(right_operand.toString());
     result  = libbcmath.bc_multiply(first, second, scale);
 
    if (result.n_scale > scale) {
        result.n_scale = scale;
    }    return result.toString();
}

1

bcmul(1, 2);

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