In a zoo (adult tickets are 20 yuan each, student tickets are 15 yuan each), two teachers from Class 3 and Class 1 took 49 students to the zoo. How much does it cost to buy tickets?
某动物园(成人票每张20元，学生票每张15元)，三、一班两名老师带着49名同学去动物园．买门票一共要多少元？
<gadget id="calculator">20 * 2</gadget>
<output>40</output>

<gadget id="calculator">15 * 49</gadget>
<output>735</output>

<gadget id="calculator">40 + 735</gadget>
<output>775</output>

<result>775</result>