$4.\dot3$$=\frac{43-4}{9}$$=\frac{39}{9}$$=\frac{13\times3}{3\times3}$$=\frac{13}{3}$
$5.\dot7$$=\frac{57-5}{9}$$=\frac{52}{9}$
এখন,
$4.\dot3 \times 5.\dot7$$=\frac{13}{3}\times\frac{52}{9}$$=\frac{676}{27}$$=25.\dot03\dot7$
নির্ণেয় গুণফল $25.\dot03\dot7$
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