Xiaoqiang and Xiaohui live in the same building, Xiaohui lives on the sixth floor, and Xiaoqiang lives on the third floor. Xiaohui has to walk 90 steps to go home every day, how many steps does Xiaoqiang have to walk home?
小强和小辉住在同一幢大楼里，小辉住六楼，小强住三楼．小辉每天回家要走90级台阶，小强回家要走多少级台阶？
<gadget id="calculator">6 - 1</gadget>
<output>5</output>

<gadget id="calculator">90 / 5</gadget>
<output>18</output>

<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">18 * 2</gadget>
<output>36</output>

<result>36</result>