The students collected pictures, the pictures of famous mountains accounted for (3/5), and the pictures of rivers accounted for 30%. There are 30 more pictures of famous mountains than pictures of rivers. How many pictures have been collected in total?
同学们收集图片，收集的名山图片占(3/5)，河流图片占30%．名山图片比河流图片多30张，一共收集了多少张图片？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">(3/5) - (3/10)</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">30 / (3/10)</gadget>
<output>100</output>

<result>100</result>