The price of 2 mechanical pencils in a stationery store is 7 yuan, and the price of 3 pens is 14 yuan. Teacher Zhang is going to buy 10 mechanical pencils and 21 pens for the students. How much will it cost in total?
文具店中2支自动铅笔的售价是7元，3支钢笔的售价是14元．张老师准备为同学们购买10支自动铅笔和21支钢笔，一共需要花多少元钱？
<gadget id="calculator">7 / 2</gadget>
<output>7/2 = around 3.5</output>

<gadget id="calculator">(7/2) * 10</gadget>
<output>35</output>

<gadget id="calculator">14 / 3</gadget>
<output>14/3 = around 4.666667</output>

<gadget id="calculator">(14/3) * 21</gadget>
<output>98</output>

<gadget id="calculator">35 + 98</gadget>
<output>133</output>

<result>133</result>