The number A is 3 times the number B, the number A is 240, what is the difference between the two numbers A and B?
甲数是乙数的3倍，甲数是240，甲乙两数的差是多少．
<gadget id="calculator">240 / 3</gadget>
<output>80</output>

<gadget id="calculator">240 - 80</gadget>
<output>160</output>

<result>160</result>