Documentation says that during blending src and dst colors are affected by their factors and then added together. But is there any possibility to multiply them and not to add together?
The documentation provides this:
Blend SOURCE DESTINATION
Blend DstColor Zero // Multiplicative
Blend DstColor SrcColor // 2x Multiplicative
If you consider that the first value is always what the generated colour is multiplied by, this is actually multiplying the shader colour by the destination colour.