Xiaosu lives on the third floor of a building, and his garage is on the first floor of this building. If there are 18 steps between each floor, how many steps does Xiaosu have to walk from home to the garage?
小苏家住一幢楼的3楼，他家车库在这幢楼的负1楼，如果每层之间有18级台阶，小苏从家到车库要走多少级台阶？
<gadget id="calculator">18 * 3</gadget>
<output>54</output>

<result>54</result>