Xiaohong lives on the fifth floor, and each floor has 20 steps. How many steps does Xiaohong have to walk from the ground floor to her home?
小红家住在五楼，每层楼有20个台阶，小红从底楼到自己家共要走多少个台阶．
<gadget id="calculator">20 * 4</gadget>
<output>80</output>

<result>80</result>