title: TypeError: can't multiply sequence by non-int of type 'str'
body: <pre><code>&gt;&gt;&gt; 
  Enter muzzle velocity (m/2): 60
  Enter angle (degrees): 45
  Traceback (most recent call last):
    File "F:/Python31/Lib/idlelib/test", line 9, in &lt;module&gt;
      range()
    File "F:/Python31/Lib/idlelib/test", line 7, in range
      Distance = float(decimal((2*(x*x))((decimal(math.zsin(y)))*(decimal(math.acos(y)))))/2)
  TypeError: can't multiply sequence by non-int of type 'str'
  </code></pre>
  
  <p>I'm only new, so don't be too harsh if this is really obvious, but why am i getting this error?</p>