Xiao Le's family lives on the 7th floor, and there are 30 steps between each floor. How many steps does he have to walk from the 1st floor to the 7th floor?
小乐家住在7楼，每层楼之间有30级台介，他从1楼走到7楼，共要走多少级台阶．
<gadget id="calculator">7 - 1</gadget>
<output>6</output>

<gadget id="calculator">30 * 6</gadget>
<output>180</output>

<result>180</result>