A has 120 yuan, and B's money is 15 yuan less than A's double, how much does B have?
甲有120元钱，乙的钱数比甲的2倍少15元，乙有多少．
<gadget id="calculator">120 * 2</gadget>
<output>240</output>

<gadget id="calculator">240 - 15</gadget>
<output>225</output>

<result>225</result>