Xiaohong lives in a building with 18 steps on each floor. She lives on the 4th floor. How many steps does Xiaohong walk home from school every day?
小红住的一栋楼，每层有18级台阶，她住在4楼，小红每天放学回家要走多少级台阶．
<gadget id="calculator">4 - 1</gadget>
<output>3</output>

<gadget id="calculator">18 * 3</gadget>
<output>54</output>

<result>54</result>