□/△=16...7, □The minimum filling amount.
□/△=16…7，□最小填多少．
<gadget id="calculator">7 + 1</gadget>
<output>8</output>

<gadget id="calculator">16 * 8</gadget>
<output>128</output>

<gadget id="calculator">128 + 7</gadget>
<output>135</output>

<result>135</result>