★/▲=102…8, ★The minimum amount that can be filled.
★/▲=102…8，★最小可以填多少．
<gadget id="calculator">8 + 1</gadget>
<output>9</output>

<gadget id="calculator">102 * 9</gadget>
<output>918</output>

<gadget id="calculator">918 + 8</gadget>
<output>926</output>

<result>926</result>