In a practice room, 1,800 wooden floors with a length of 50 cm, a width of 10 cm, and a thickness of 3 cm were laid. How big is the practice room?
在一个练功房里铺设了1800块长50cm，宽10cm，厚3cm的木质地板．这个练功房的面积有多大？
<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(1/2) * (1/10) * 1_800</gadget>
<output>90</output>

<result>90</result>