Master Wang was fined 200 yuan for speeding. He drove 120 kilometers per hour, exceeding the speed limit (1/3) of the expressway. How many kilometers per hour was the speed limit of the car driven by Master Wang?
王师傅驾车因超速被罚款200元，他驾车每小时行驶120千米，超过高速公路限速的(1/3)，王师傅驾驶的汽车每小时超速多少千米？
<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">120 / (4/3)</gadget>
<output>90</output>

<gadget id="calculator">120 - 90</gadget>
<output>30</output>

<result>30</result>