The lifespan of a sea lion is about 30 years, and the lifespan of a sea lion is (3/4) that of a walrus. What is the approximate lifespan of a walrus?
海狮的寿命大约是30年，海狮的寿命是海象的(3/4)．海象的寿命大约是多少年？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">30 / (3/4)</gadget>
<output>40</output>

<result>40</result>