The sum of 3 consecutive natural numbers is 15, what is the product of these 3 numbers
连续3个自然数的和是15，则这3个数的积是多少
<gadget id="calculator">15 / 3</gadget>
<output>5</output>

<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">5 + 1</gadget>
<output>6</output>

<gadget id="calculator">4 * 5 * 6</gadget>
<output>120</output>

<result>120</result>