Xiaoming's family lives on the 5th floor. It takes him 0.5 minutes to go up each floor. How many minutes will it take him to go upstairs every day?
小明家住在5楼，他每上一层楼需要0.5分钟，他每天上楼将用去多少分钟．
<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">4 * 0.5</gadget>
<output>2</output>

<result>2</result>