Among all the odd numbers from 1 to 301, how many times does the number 3 appear?
在1至301的所有奇数中，数字3共出现多少次．
<gadget id="calculator">301 - 1</gadget>
<output>300</output>

<gadget id="calculator">300 / 10</gadget>
<output>30</output>

<gadget id="calculator">300 / 100</gadget>
<output>3</output>

<gadget id="calculator">5 * 3</gadget>
<output>15</output>

<gadget id="calculator">30 + 15 + 1</gadget>
<output>46</output>

<result>46</result>