The lifespan of a horse is 30 years. The lifespan of a horse is shorter than that of a lion (1/4), and the lifespan of a lion is longer than that of a tiger (1/3). How many years are the lifespans of a lion and a tiger?
马的寿命是30年，马的寿命比狮子短(1/4)，狮子的寿命比老虎长(1/3)，狮子与老虎的寿命各是多少年？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

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

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 + (1/3)</gadget>
<output>4/3 = around 1.333333</output>

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

<result>30</result>