question: How many more civilians were killed in 393,000 compared to 100,000?
#1 return civilians 
#2 return #1 that were killed 
#3 return number of  #2 
#4 return #3 that is equal to 393,000 
#5 return #3 that is equal to 100,000 
#6 return the  difference of #4 and  #5