Improve quoting

Akuli · Akuli · commit 8319c099c149 · 2016-06-06T14:09:33.000+03:00
diff --git a/1.md b/1.md
@@ -197,7 +197,9 @@ See the [official documentation of the math module](https://docs.python.org/3/li
 ### Exercises
 
 1. A company needs to buy new computers and monitors. With taxes, a new monitor costs 49,95 € and a new computer costs 200 €. How much would 100 computers cost without taxes, when the taxes are 24 % of the price?
-2. The volume of a sphere with radius r is 4/3 π r³. What is the volume of a sphere with radius 5? (taken from the end of [this](http://www.greenteapress.com/thinkpython/html/thinkpython003.html) page)
+2. Taken from [here](http://www.greenteapress.com/thinkpython/html/thinkpython003.html):
+
+    > The volume of a sphere with radius r is 4/3 π r³. What is the volume of a sphere with radius 5?
 
 The answers are [here](answers.md).
 
