Find: The ratio of 2 square centimeters to 3.2 square meters.
求：2平方厘米和3.2平方米的比值．
<gadget id="calculator">2 / 32_000</gadget>
<output>1/16_000 = around 0.000063</output>

<result>1/16_000 = around 0.000063</result>