Parentheses are added in the given order of operations. Subtract → divide → add 6000/60-30+60.
按照给定的运算顺序添括号．减→除→加6000/60-30+60．
<gadget id="calculator">60 - 30</gadget>
<output>30</output>

<gadget id="calculator">6_000 / 30</gadget>
<output>200</output>

<gadget id="calculator">200 + 60</gadget>
<output>260</output>

<result>260</result>