A's number is 80, B's number is 5 less than A's (3/4), what is B's number?
甲数是80，乙数比甲数的(3/4)少5，乙数是多少．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">80 * (3/4)</gadget>
<output>60</output>

<gadget id="calculator">60 - 5</gadget>
<output>55</output>

<result>55</result>