In a building, there are 23 steps to climb to each floor. Teacher Zhang’s house is on the 7th floor. How many steps does he have to climb from the first floor to his own house?
一幢楼房，每上一层楼要爬23级台阶，张老师家在7楼，他从一楼到自己家，一共要爬多少级台阶．
<gadget id="calculator">7 - 1</gadget>
<output>6</output>

<gadget id="calculator">6 * 23</gadget>
<output>138</output>

<result>138</result>