Xiaohui has to walk 60 steps from the 1st floor to the 6th floor, and how many steps does she have to walk to the 12th floor?
小惠从1楼到6楼要走60个台阶，到12楼还要走多少个台阶．
<gadget id="calculator">6 - 1</gadget>
<output>5</output>

<gadget id="calculator">60 / 5</gadget>
<output>12</output>

<gadget id="calculator">12 - 6</gadget>
<output>6</output>

<gadget id="calculator">12 * 6</gadget>
<output>72</output>

<result>72</result>