The tallest animal in the world is the giraffe. There is a giraffe 5 meters tall, which is 2/3 taller than an elephant. How many meters taller is the giraffe than the elephant?
世界上最高的动物是长颈鹿．有一只长颈鹿高5米，比-头大象还要高(2/3)，长颈鹿比大象高多少米？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 + (2/3)</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">5 / (5/3)</gadget>
<output>3</output>

<gadget id="calculator">3 * (2/3)</gadget>
<output>2</output>

<result>2</result>