元のHTML
<div><img src="https://jp-prod.asyncgw.teams.microsoft.com/v1/objects/0-ejp-d4-b3e00aa0067fbc94cf9c3449dfb79aaa/views/imgo" itemscope="" itemtype="http://schema.skype.com/AMSImage" style="width:768px; height:1024px"><br>
<img src="https://jp-prod.asyncgw.teams.microsoft.com/v1/objects/0-wjp-d4-61b490fff160b04946b109e5e28cc84c/views/imgo" itemscope="" itemtype="http://schema.skype.com/AMSImage" style="width:768px; height:1024px"><br>
<img src="https://jp-prod.asyncgw.teams.microsoft.com/v1/objects/0-ejp-d1-92bad960b60f144b2ca70336a8f7202a/views/imgo" itemscope="" itemtype="http://schema.skype.com/AMSImage" style="width:768px; height:1024px"><br>
<img src="https://jp-prod.asyncgw.teams.microsoft.com/v1/objects/0-ejp-d4-eb2a4f299a805bac84321c4b30af4083/views/imgo" itemscope="" itemtype="http://schema.skype.com/AMSImage" style="width:768px; height:1024px"></div>