There are 22 steps between the two floors, and the height of each step is 15 cm. How much is the rise from the first floor to the fourth floor?
两层楼之间有22个台阶，每个台阶的高度是15厘米，从一楼到四楼升高了多少厘米
<gadget id="calculator">4 - 1</gadget>
<output>3</output>

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

<result>990</result>