Fixing conversion mistakes in throuput/duration

syringefilled.cpp

@@ -208,13 +208,13 @@ float SyringeFilled::distance_mm_to_volume_mL(float distance_mm)
 
 float SyringeFilled :: throughput_uL_per_min_to_duration_sec(float throughput_uL_per_min)
 {
-    return (get_exchange_volume_mL()/throughput_uL_per_min)*1000*60;
+    return ((get_exchange_volume_mL()*1000*60)/throughput_uL_per_min);
 }
 
 
 float SyringeFilled :: duration_sec_to_throughput_uL_per_min(float duration_sec)
 {
-    return (get_exchange_volume_mL()/duration_sec)*1000/60;
+    return (get_exchange_volume_mL()*1000*60/duration_sec);
 }
 
 float SyringeFilled :: throughput_uL_per_min_to_speed(float throughput_uL_per_min)