Given that the sum of three consecutive natural numbers is 30, what is their product?
已知三个连续自然数的和是30，那它们的积是多少．
<gadget id="calculator">30 / 3</gadget>
<output>10</output>

<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">10 + 1</gadget>
<output>11</output>

<gadget id="calculator">9 * 10 * 11</gadget>
<output>990</output>

<result>990</result>