$26-$2A/38-42:   Floating point product of Multiply and Divide

  Used by Jiffy-DOS: ALLFLAG/RSIZE ($26)
  Used by Jiffy-DOS: COMSAV ($27)

   Used only from Basic for Jiffy-DOS wedge comands, device
   toggle and function keys.

Kernal-Reference:

 LDA $26     : $BA77 $BB8F
 ROR $26     : $BA7D
 STA $26     : $BA35 $BA7B

 LDA $27     : $BA71 $BB93
 ROR $27     : $BA7F
 STA $27     : $BA37 $BA75

 ADC $28     : $B36F
 LDA $28     : $BA6B $BB97
 ROR $28     : $BA81
 STA $28     : $B350 $BA39 $BA6F
 STX $28     : $B337

 ADC $29     : $B373
 LDA $29     : $BA65 $BB9B
 ROR $29     : $BA83
 STA $29     : $B355 $BA3B $BA69
     $29,X   : $BB44

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