There are 170 bags of rice and flour in the supermarket. If there are 20 more bags of rice and 15 bags of flour, the number of bags of rice is 1 bag more than twice the number of bags of flour. How many bags of rice are there?
超市原有大米和面粉共170袋，如果大米增加20袋，面粉减少15袋，那么大米的袋数比面粉袋数的2倍还多1袋．原来大米有多少袋？
<gadget id="calculator">170 * 2</gadget>
<output>340</output>

<gadget id="calculator">1 - 20</gadget>
<output>-19</output>

<gadget id="calculator">340 + (-19)</gadget>
<output>321</output>

<gadget id="calculator">1 + 2</gadget>
<output>3</output>

<gadget id="calculator">321 / 3</gadget>
<output>107</output>

<result>107</result>