The life span of a sea lion is (3/4) that of a walrus, the life span of a seal is (2/3) that of a sea lion, and the life span of a seal is that of a walrus ((())/(())).
海狮的寿命是海象的(3/4)，海豹的寿命是海狮的(2/3)，海豹的寿命是海象的((())/(()))．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(3/4) * (2/3)</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>