Tiantian Supermarket entrusted Master Zhang to deliver 400 porcelain bowls, and the shipping fee was 1.2 yuan for every 10 porcelain bowls. At the final checkout, Master Zhang got a shipping fee of 45.6 yuan. Ask Master Zhang how many porcelain bowls were damaged during transportation?
天天超市委托张师傅运送400个瓷碗，每10个瓷碗运费1.2元，如果破损一个瓷碗不但不给运费，张师傅还要赔偿1.08元．最后结账张师傅得运费45.6元．问张师傅运送过程中破损几个瓷碗？
<gadget id="calculator">1.2 / 10</gadget>
<output>0.12</output>

<gadget id="calculator">400 * 0.12</gadget>
<output>48</output>

<gadget id="calculator">48 - 45.6</gadget>
<output>2.4</output>

<gadget id="calculator">0.12 + 1.08</gadget>
<output>1.2</output>

<gadget id="calculator">2.4 / 1.2</gadget>
<output>2</output>

<result>2</result>