It is known that ★+★+★+★=100, 〇*★=100, ☐/〇=100. Then ☐=how much.
已知★+★+★+★=100，〇*★=100，☐/〇=100．则☐=多少．
<gadget id="calculator">100 / 4</gadget>
<output>25</output>

<gadget id="calculator">100 / 25</gadget>
<output>4</output>

<gadget id="calculator">100 * 4</gadget>
<output>400</output>

<result>400</result>