There are 22 steps between the two floors, each step is 15 centimeters high, how many centimeters is the height from the top of the first floor to the fourth floor.
两层楼之间有22个台阶，每个台阶高15厘米，一楼楼顶到四楼高多少厘米．
<gadget id="calculator">4 - 1</gadget>
<output>3</output>

<gadget id="calculator">22 * 3 * 15</gadget>
<output>990</output>

<result>990</result>