Xiao Ming's family lives on the eighth floor, and Xiao Hua's family lives on the fourth floor. The number of steps between each floor is the same. Xiao Hua has to walk 54 stairs to go home, how many stairs does Xiao Ming have to go home?
小明家住在八楼，小华家住在四楼，每层楼之间的级数相同．小华回家共要走54级楼梯，小明回家要走多少级楼梯？
<gadget id="calculator">4 - 1</gadget>
<output>3</output>

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

<gadget id="calculator">8 - 1</gadget>
<output>7</output>

<gadget id="calculator">18 * 7</gadget>
<output>126</output>

<result>126</result>