There were 10 snowflakes at first. It snowed an additional 4 snowflakes every 5 minutes. How many minutes passed before there were 58 snowflakes?
Without the first 10 snowflakes, there are 58-10=
<gadget id="calculator">58-10</gadget>
<output>48</output>
48 snowflakes needed.
48/4=12 5-minute intervals are needed to get the additional snowflakes.
12*5=
<gadget id="calculator">12*5</gadget>
<output>60</output>
60 minutes passed.

<result>60</result>