The charging standard for long-distance calls is 1 yuan and 30 cents per minute. Li Tao made long-distance calls for 12 minutes. How much should he pay?
长途电话的话费的收取标准为每分钟1元3角，李涛共打长途电话12分钟，他应付多少钱？
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 + (3/10)</gadget>
<output>13/10 = around 1.3</output>

<gadget id="calculator">(13/10) * 12</gadget>
<output>78/5 = around 15.6</output>

<result>78/5 = around 15.6</result>