There is a rectangular lawn under the overpass. Xiaojun walked 150 steps along the long side and 70 steps along the short side with an average span of 0.6 meters per step. How many hectares is this lawn about?
立交桥下有一块长方形的草坪，小军以平均每步0.6米的跨度，沿长边走了150步，沿短边走了70步，这块草坪约为多少公顷．
<gadget id="calculator">0.6 * 150</gadget>
<output>90</output>

<gadget id="calculator">0.6 * 70</gadget>
<output>42</output>

<gadget id="calculator">42 / 10_000</gadget>
<output>21/5_000 = around 0.0042</output>

<gadget id="calculator">90 * (21/5_000)</gadget>
<output>189/500 = around 0.378</output>

<result>189/500 = around 0.378</result>