If 3◎2=3*5-2*2, 0.5◎0.7=0.5*5-0.7*2, ...then, A◎B=5A-2B, try to calculate (1.2◎1.5)◎7= how much.
若3◎2=3*5-2*2，0.5◎0.7=0.5*5-0.7*2，…那么，A◎B=5A-2B，试计算(1.2◎1.5)◎7=多少．
<gadget id="calculator">5 * 3</gadget>
<output>15</output>

<gadget id="calculator">2 * 7</gadget>
<output>14</output>

<gadget id="calculator">15 - 14</gadget>
<output>1</output>

<result>1</result>