There are 23 boys and 22 girls in the first class of the sixth grade. The whole class accounts for (3/10) of the total number of sixth grade students. How many students are there in grade six? (solution with equations and arithmetic)
六年级一班有男生23人，女生22人，全班学生占六年级学生总数的(3/10)．六年级有学生多少人？(用方程和算术方法解)
<gadget id="calculator">22 + 23</gadget>
<output>45</output>

<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">45 / (3/10)</gadget>
<output>150</output>

<result>150</result>