The Municipal Science and Technology Building has 12 floors and a height of 42 meters. The Technology Demonstration Hall is located on the 9th floor. Q How many meters is the floor of the technology demonstration hall from the ground?
市科技大楼共有12层，高度是42米，科技演示厅设在9楼．问科技演示厅的地板离地有多少米？
<gadget id="calculator">42 / 12</gadget>
<output>7/2 = around 3.5</output>

<gadget id="calculator">9 - 1</gadget>
<output>8</output>

<gadget id="calculator">(7/2) * 8</gadget>
<output>28</output>

<result>28</result>