In a division formula, the sum of the dividend, divisor, quotient, and remainder is 129. If the quotient and remainder are both 3, what is the dividend?
在一个除法算式里，被除数、除数、商、余数的和是129，如果商和余数都是3，被除数是多少．
<gadget id="calculator">129 - 3 - 3 - 3</gadget>
<output>120</output>

<gadget id="calculator">3 + 1</gadget>
<output>4</output>

<gadget id="calculator">120 / 4</gadget>
<output>30</output>

<gadget id="calculator">30 * 3</gadget>
<output>90</output>

<gadget id="calculator">90 + 3</gadget>
<output>93</output>

<result>93</result>