theorem divlemul2r (a b c: nat): $ b != 0 -> a <= c * b -> a // b <= c $;
    
      
        | Step | Hyp | Ref | Expression | 
        
          | 1 | 
           | 
          leeq2 | 
          c * b = b * c -> (a <= c * b <-> a <= b * c)  | 
        
        
          | 2 | 
           | 
          mulcom | 
          c * b = b * c  | 
        
        
          | 3 | 
          1, 2 | 
          ax_mp | 
          a <= c * b <-> a <= b * c  | 
        
        
          | 4 | 
           | 
          divlemul1r | 
          b != 0 -> a <= b * c -> a // b <= c  | 
        
        
          | 5 | 
          3, 4 | 
          syl5bi | 
          b != 0 -> a <= c * b -> a // b <= c  | 
        
      
    
    Axiom use
    axs_prop_calc
     (ax_1,
      ax_2,
      ax_3,
      ax_mp,
      itru),
    
axs_pred_calc
     (ax_gen,
      ax_4,
      ax_5,
      ax_6,
      ax_7,
      ax_10,
      ax_11,
      ax_12),
    
axs_set
     (elab,
      ax_8),
    
axs_the
     (theid,
      the0),
    
axs_peano
     (peano1,
      peano2,
      peano5,
      addeq,
      muleq,
      add0,
      addS,
      mul0,
      mulS)