It is known that (○+△)*2=9.6, and △/0.6=2.5, then ○=how much.
已知(○+△)*2=9.6，而且△/0.6=2.5，那么○=多少．
<gadget id="calculator">9.6 / 2</gadget>
<output>4.8</output>

<gadget id="calculator">2.5 * 0.6</gadget>
<output>1.5</output>

<gadget id="calculator">4.8 - 1.5</gadget>
<output>3.3</output>

<result>3.3</result>