Silver weighs (21/2) grams per cubic centimeter, which is (3/38) lighter than lead per cubic centimeter. How much does lead weigh in grams per cubic centimeter?
每立方厘米的银重(21/2)克，比每立方厘米铅轻(3/38)．每立方厘米铅重多少克？
<gadget id="calculator">21 / 2</gadget>
<output>21/2 = around 10.5</output>

<gadget id="calculator">3 / 38</gadget>
<output>3/38 = around 0.078947</output>

<gadget id="calculator">1 - (3/38)</gadget>
<output>35/38 = around 0.921053</output>

<gadget id="calculator">(21/2) / (35/38)</gadget>
<output>57/5 = around 11.4</output>

<result>57/5 = around 11.4</result>