There are 15 grams in 500 grains of wheat, and how many tons are there in 1.4 billion grains of wheat?
500粒小麦有15克，14亿粒小麦有多少吨．
<gadget id="calculator">15 / 500</gadget>
<output>3/100 = around 0.03</output>

<gadget id="calculator">(3/100) * 14 * 100</gadget>
<output>42</output>

<result>42</result>