Divide 5 tons of goods into 9 parts on average, each part is ((())/(())) of these goods, how many tons does each part weigh, and each part weighs 1 ton ((())/(())) ).
把5吨货物平均分成9份，每份是这些货物的((())/(()))，每份重多少吨，每份重量是1吨的((())/(()))．
<gadget id="calculator">1 / 9</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">1 / (1/9)</gadget>
<output>9</output>

<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<result>5/9 = around 0.555556</result>