Given that ▲+▲+▲=60, ■*▲=60, ★/■=60, then ★=how much.
已知▲+▲+▲=60，■*▲=60，★/■=60，则★=多少．
<gadget id="calculator">60 / 3</gadget>
<output>20</output>

<gadget id="calculator">60 / 20</gadget>
<output>3</output>

<gadget id="calculator">3 * 60</gadget>
<output>180</output>

<result>180</result>