1*4+4*7+7*10+...+49*52=how much.
1*4+4*7+7*10+…+49*52=多少．
<gadget id="calculator">46 * 49 * 52</gadget>
<output>117_208</output>

<gadget id="calculator">2 * 1 * 4</gadget>
<output>8</output>

<gadget id="calculator">117_208 + 8</gadget>
<output>117_216</output>

<gadget id="calculator">117_216 / 9</gadget>
<output>13_024</output>

<result>13_024</result>