Xiao Ming read a total of 15 pages in the first 3 days, and 16 pages a day in the next 4 days. How many pages did he read in total this week?
小明前3天共看书15页，后4天每天看16页，这星期他共看书多少页？
<gadget id="calculator">15 * 3</gadget>
<output>45</output>

<gadget id="calculator">16 * 4</gadget>
<output>64</output>

<gadget id="calculator">45 + 64</gadget>
<output>109</output>

<result>109</result>